Balmuda Inc.

Jfe Steel Corporation

Rhythm Watch Co., Ltd.

Jun Takano

Kazunari Takahashi

Masaki Yoshikawa

Takamasa Kawai

Takuya Nagahama

Masateru Ueta

Hiroshi Chikatsune

Seigo Goto

Tsuyoshi Yoneyama

Haruhiko Seki

Hideo Sato

Taro Kanayama

Hajime Ikeuchi

Nobuhiko Morioka

Junya Ura

Shu Kokubo

Tamafumi Sasada

Masaki Ueta

To prevent fracture of a box under a tensile load without increasing the outer diameter of the box. The presently disclosed threaded joint for pipes includes a pin provided with a male thread portion at one end of a first pipe, and a box provided with a female thread portion at one end of a second pipe, where each of a plurality of thread grooves of the female thread portion has a corner portion on a load flank side and a corner portion on a stabbing flank side on a thread bottom side, a corner portion on a load flank side of a first thread groove includes a first arc portion that has a first curvature radius, and a second arc portion that has a second curvature radius, and a ratio of the second curvature radius to the first curvature radius is 3 or more.

Threaded joint for pipes

A speaker outputting sound from a speaker portion arranged facing upward. The speaker is provided with: a first head portion including the speaker portion; a first base portion; a transparent first housing arranged between the first head portion and the first base portion; at least one LED unit arranged inside the first housing; and a control portion for driving LED elements of the LED unit on the basis of a sound signal from the outside. Each LED unit is provided with: a second head portion; a second base portion; and a transparent second housing arranged between the second head portion and the second base portion. As a result, light linked to the sound, emitted from the LED elements of the LED units, can be efficiently delivered to the eye of the user.

Speaker

Humidifier

Growing community of inventors

Tokyo, Japan

Jun Takano